Silk screen clamping arrangement

ABSTRACT

Clamping apparatus including two sets of clamping jaws which are hinged together. The clamping jaws may be disassembled and connected together in various ways to permit various hinged and clamped arrangements as disclosed in the following specification.

United States Patent Inventor Eddie R. Parker 1515 Winfield Street.Indianapolis Ind. 46222 Appl. No. 797,089 Filed Feb. 6, 1969 PatentedJune 22. 1971 SILK SCREEN CLAMPING ARRANGEMENT 9 Claims, 5 Drawing Figs.

US. Cl 248/229, 16/158, 248/316. 269/97 Int. Cl 4. EOSd 5/02 Field ofSearch 248/229, 226, 226.2, 291, 316; 269/97. 152; 16/158, 129; 287/60[56] References Cited UNITED STATES PATENTS 1,450,732 4/1923 Mueller248/226 1659302 2/1928 Reinhardt.... 269/97 X 3,199,206 8/1965 Snapp248/229 X 3.203.030 8/1965 Barnes 16/129 Primary ExaminerChancel|or E.Harris Assistant Examiner.l. Franklin Foss Attorney-Woodard, Weikart,Emhardt & Naughton ABSTRACT: Clamping apparatus including two sets ofclamping jaws which are hinged together. The clamping jaws may bedisassembled and connected together in various ways to permil varioushinged and clamped arrangements as disclosed in the followingspecification.

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EDD/E R. PARKER AT TORN 5 Y8 SILK SCREEN CLAMPING ARRANGEMENT BACKGROUNDOF THE INVENTION 1. Field of the Invention This invention relatesgenerally to clamping apparatus particularly adapted for use in silkscreen printing.

2. Description of the Prior Art In the making of posters, signs and thelike by silk screen printing, it is the usual practice to first make aphotograph ora drawing. The drawing or photograph is then hand cut tomake a stencil which is then adhered to silk mounted on a frame;photographic stencils also are used. The silk screen is then usedrepeatedly to place the representation on paper, cardboard or the like.This work is usually done on a table of some sort. Register guidesmounted on the table make possible lining up the silk screen with thepaper, cardboard, or, alternatively, the original art work can be placedunder the screen for registry purposes. It is desirable that the silkscreen with its frame be movable away from the table upon which suchwork is done but it is also desirable that the silk screen with itsframe be repositionable in exactly the same position from which itmoved.

SUMMARY OF THE INVENTION One embodiment of the present invention mightinclude clamping apparatus for use in silk screen printing comprising afirst angle element, a first clamping jaw, a first stud secured to saidfirst angle element and extending through said first clamp, a wingnutreceived on said stud and urging said first clamping jaw into clampingrelation with said first angle element, a second angle element, a secondclamping jaw, a second stud secured to said second angle element, saidsecond clamping jaw being receivable on said second stud for clampingcooperation with said second angle element, a wingnut receivable on saidsecond stud for urging said second clamping jaw into clamping relationwith said second angle element, said first clamping jaw and said secondangle element being hingedly connected to one another.

One object of this invention is to provide a clamping apparatus whichfacilitates silk screen printing.

Another object of this invention is to provide clamping apparatus whichmakes possible accurate and rapid positioning and repositioning ofa silkscreen with its frame on a table.

Related objects and advantages will appear as the descrip tion proceeds.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a perspective view ofa tablehaving the silk screen clamping arrangement of the present invention inuse thereon.

FIG. 2 is a view of another table showing the clamping arrangement ofthe present invention in a different operating position on the table ofFIG. 2.

FIGS. 3 and 4 are enlarged perspective views of a portion of thestructure illustrated in FIG. 1 and showing the structure in twodifferent operating positions.

FIG. 5 is an enlarged perspective view of a portion of the structureillustrated in FIG. 1.

DESCRIPTION OF THE PREFERRED EMBODIMENT Referring now more particularlyto FIG. 1, there is illus trated a table on which is mounted a hinge bar11. The, hinge bar 11 is'fixed in position at its opposite ends byclamping apparatus 12 which is shown in greater detail in FIG. 5. Alsoshown in FIG. 1 are further clamping apparatus assemblies 15, 16, I7 and18. FIGS. 3 and 4 show representative examples of the clampingassemblies l5, l6, l7 and 18. In FIG. 1, there is also illustrated arelatively large silk screen with its frame 21 as well as a smaller silkscreen 22 with its frame 23.

Referring to FIG. 2, there is illustrated a clamping assembly 25 whichincludes a second angle element 26 and a second clamping jaw 27. Thesecond angle element 26 has generally an angle shape configuration whichincludes the two legs 30 and 31. The leg 31 is thickened at 32 toprovide a cylindrical bore (not shown) through which the pin 35 passesand also to provide a location for a tapped bore for the fixed mountingof a stud 36. The stud 36 extend through a suitable bore in the clampingjaw 27. Threadedly received upon the stud 36 is a wingnut 40 which isused to urge the clamping jaw 27 into clamping relation with the angleelement 26.

The pin 35 extends through a bifurcated yoke portion 41 of a first angleelement 42. The element 42 also has basically an angle shape includingthe one leg 45 and a further leg 46 which is substantially thicker thanthe leg 45 and which also is integral with the bifurcated yoke portion41. The leg 46 is provided with a pair of countersunk bores 47 which maybe used, if desired, to fix the element 42 to the table 50.

The thickened leg 46 of the element 42 also provides a location for atapped bore to receive a stud 51 upon which is received a first clampingjaw 52 which may be urged into clamping relation toward the angleelement 42 by means of a wingnut 60 threadedly received upon the stud51. As shown in FIG. 2 the elements 26 and 42 each functions as aclamping jaw; however, as will become evident from the other figures ofthe application the element 26 in some cases does not so function andthe same can be true for the element 42. It will be noted that thestructure as arranged in FIG. 2 permits the silk screen 61 with itsframe 62 to be swung upwardly about the axis of the pin 35 away from thetable 50 so as to permit the placing of various work and the likeunderneath the silk screen 61. It can also be appreciated that when thesilk screen 61 with its frame 62 is swung back into the illustratedposition it will always be repositioned accurately and precisely at thesame position in which it was previously located. It should be notedthat the thickness of the legs 45 and 30 of the members 42 and 26 is notsubstantial so that the frame 62 upon which the silk screen 61 ismounted is not spaced a substantial amount away from the table 50. Thus,in one embodiment of the invention the total thickness of these two legsis less than a quarter of an inch.

Referring now to FIG. 3, it can be seen that the element 26 does notfunction as a clamping jaw but instead functions only as a mountingmember for the stud 36. As shown in FIG. I, the stud 36 may be replacedwith a much longer stud 70' so as to make possible use of the clampingapparatus of the present invention for clamping in position a silkscreen 22 which is spaced a substantial distance away from the hinge bar11. In FIG. 3, the hinge bar 11 is shown as having mounted thereon thefirst angle element 42 and the first angle element 52 which are fixedtogether by the stud 51 and the wingnut 60. The second angle element 26is shown as hinged to the first angle element 42 by means of the pin 35.The stud 36 is shown with a jamnut 70 which may be used if desired andnecessary.

The stud 36 has fixed thereto another clamping jaw element 75 which isidentical to the second angle element 26. The stud 36 is threaded into asuitable tapped bore identical to the tapped bore in the second angleelement 26. Received on the stud 36 is the wingnut 40 as well as theclamping jaw 27. The wingnut 40 is tightened down against the clampingjaw 27 causing it to move into clamping relation with the clamping jaw75 and clamping the frame 21 of the silk screen 20 in position. It canbe appreciated that the structure illustrated in FIG.

3 permits the frame 211 to be swung upwardly away from the illustratedposition of FIG. 1 on the table up to a position which permits removingand replacing of materials beneath the screen 20. Such swinging orhinging is about the axis of the pin 35.

Referring to FIG. 4, there is illustrated an assembly which is in manyrespects identical to the assembly of FIG. 3. Thus, the hinge bar 11 isprovided as are the various parts 70, 36, 26, 42, 60, 52 and 35identical to the above-described structure of FIG. 3. In FIG. 4,however, certain additional structure is shown as including a turnbucklewhich is threadedly connected to the stud 36. Threadedly receivedwithinthe turnbuckle 80 is a further stud 81. Optionally received uponthe further stud 81 may be ajam nut 82.

In HO. 4 the clamping jaws 27 and '75 are shown in somewhat reversedposition. in other words, the stud 81 is threaded into the thickenedportion 82 of the clamping jaw 27. The bore through the clamping jaw 27is used to receive stud 85 which is threaded into a suitable tapped borein the clamping jaw 75. The wingnut 40 is received on stud 85 and forcesthe clamping jaw 27 against clamping jaw 75. A jamnut 86 may beoptionally received upon the stud 81, and functions to fix the stud 81relative to the clamping jaw 27. The structure of FIG. 4 as well as thestructure of FIG. 3 permits swinging the frame 21 of the silk screenaway from the table for removing and replacing work and the like beneaththe silk screen 20. The turnbuckle 80 also permits accurate fineadjustment of the position of the frame 21 to precisely locate the artwork on the silk screen in proper registry. When the apparatus is usedas shown for the silk screen 22 in FIG. 1, the stud 36 is replaced bythe much longer stud 70'. When the apparatus is so used, a paper orcardboard of relatively large size can be printed at more than onelocation on the paper by inverting the paper for the various printings.

Referring now to FIG. 5, the manner of using the present invention tosecure the hinge bar 11 in place is illustrated. As shown in FIG. 5, theclamping jaw 75 is used along with the clamping jaw 27, the stud 85 andthe wingnut 40 to clamp the hinge bar in place to the table 10.

It should also be mentioned that an easy convenient means for keepingthe pin 35 in position is a piece of an adhesive tape which is appliedover the head of the pin and contacts the member 42. The loose hinge pin35 is not threaded and, except for its enlarged head, is cylindrical inconfigurationv It will be evident from the above description that thepresent invention provides an improved clamping apparatus whichfacilitates silk screen printing. It will also be evident that theclamping apparatus of the present invention makes possible accurate andrapid positioning and repositioning of a silk screen and frame on atable.

lclaim:

l. Clamping apparatus for use in silk screen printing comprising a firstangle element, a first clamping jaw, a first stud secured to said firstangle element and extending through said first clamping jaw, a wingnutreceived on said stud and urging said first clamping jaw into clampingrelation with said first angle element, a second angle element, a secondclamping jaw, a second stud secured to said second angle element, saidsecond clamping jaw being receivable on said second stud for clampingcooperation with said second angle element, a wingnut receivable on saidsecond stud for urging said second clamping jaw into clamping relationwith said second angle element, and a readily removable pin hingedlyconnecting said first angle element and said second angle element to oneanother.

2. Apparatus as defined in claim 1 and additionally comprising aturnbuckle threadedly received on said second stud, a third studthreadedly received in said turnbuckle and secured to said secondclamping jaw, a third clamping jaw, a fourth stud secured to said thirdclamping jaw and extending through said second clamping jaw, and awingnut received on said fourth stud and urging said second clamping jawinto clamping relation with said third clampingjaw.

3. Apparatus as defined in claim 2, wherein one of said element andthird jaw having a ri ht-angle sha e confi uration, said first angleelement inclu mg a yoke w ich stra dles said second angle element.

6. Apparatus as defined in claim 3, wherein said one stud is said secondstud.

7. Clamping apparatus comprising a first clamping element, a firstclamping jaw mounted on said first clamping element and movable thereonin such a manner as to grip an object between said jawand said element,a second clamping element, a readily removable pin hingedly mountingsaid second clamping element on said first clamping element, a secondclamping jaw mounted on said second clamping element and movable thereonin such a manner as to grip an object between said second jaw and secondelement.

8. The clamping apparatus of claim 7, wherein said first element has afirst passage therethrough and said second element includes a pair ofprojections which straddle the portion of said first element includingsaid passage, said projections also having passages therein which arealigned with said first passage, said pin projecting into said passagesand being readily removable therefrom.

9. Apparatus as defined in claim 1 additionally comprising a thirdclamping jaw having said second stud secured thereto, said secondclamping jaw being received on said second stud, and a wingnut receivedon said second stud and urging said second clamping jaw into clampingcooperation with said third clamping jaw.

1. Clamping apparatus for use in silk screen printing comprising a firstangle element, a first clamping jaw, a first stud secured to said firstangle element and extending through said first clamping jaw, a wingnutreceived on said stud and urging said first clamping jaw into clampingrelation with said first angle element, a second angle element, a secondclamping jaw, a second stud secured to said second angle element, saidsecond clamping jaw being receivable on said second stud for clampingcooperation with said second angle element, a wingnut receivable on saidsecond stud for urging said second clamping jaw into clamping relationwith said second angle element, and a readily removable pin hingedlyconnecting said first angle element and said second angle element to oneanother.
 2. Apparatus as defined in claim 1 and additionally comprisinga turnbuckle threadedly received on said second sTud, a third studthreadedly received in said turnbuckle and secured to said secondclamping jaw, a third clamping jaw, a fourth stud secured to said thirdclamping jaw and extending through said second clamping jaw, and awingnut received on said fourth stud and urging said second clamping jawinto clamping relation with said third clamping jaw.
 3. Apparatus asdefined in claim 2, wherein one of said second and third studs issubstantially longer than the dimensions of said first and fourth studs,jaws and elements.
 4. Apparatus as defined in claim 2, and additionallycomprising a pair of jamnuts, one of said jamnuts being received on saidsecond stud in engagement with said second angle element, the other ofsaid jamnuts being received on said third stud in engagement with saidsecond clamping jaw.
 5. Apparatus as defined in claim 2 wherein saidsecond angle element has an identical configuration to said thirdclamping jaw, each of said first angle element, second angle element andthird jaw having a right-angle shape configuration, said first angleelement including a yoke which straddles said second angle element. 6.Apparatus as defined in claim 3, wherein said one stud is said secondstud.
 7. Clamping apparatus comprising a first clamping element, a firstclamping jaw mounted on said first clamping element and movable thereonin such a manner as to grip an object between said jaw and said element,a second clamping element, a readily removable pin hingedly mountingsaid second clamping element on said first clamping element, a secondclamping jaw mounted on said second clamping element and movable thereonin such a manner as to grip an object between said second jaw and secondelement.
 8. The clamping apparatus of claim 7, wherein said firstelement has a first passage therethrough and said second elementincludes a pair of projections which straddle the portion of said firstelement including said passage, said projections also having passagestherein which are aligned with said first passage, said pin projectinginto said passages and being readily removable therefrom.
 9. Apparatusas defined in claim 1 additionally comprising a third clamping jawhaving said second stud secured thereto, said second clamping jaw beingreceived on said second stud, and a wingnut received on said second studand urging said second clamping jaw into clamping cooperation with saidthird clamping jaw.